2003
Two Redox-Active β-Carotene Molecules in Photosystem II †
Tracewell C, Brudvig G. Two Redox-Active β-Carotene Molecules in Photosystem II †. Biochemistry 2003, 42: 9127-9136. PMID: 12885246, DOI: 10.1021/bi0345844.Peer-Reviewed Original ResearchMeSH KeywordsAdaptation, PhysiologicalBeta CaroteneCyanobacteriaDarknessElectron Spin Resonance SpectroscopyFree RadicalsFreezingLight-Harvesting Protein ComplexesNormal DistributionOxidation-ReductionPhotochemistryPhotosynthetic Reaction Center Complex ProteinsPhotosystem II Protein ComplexSpectroscopy, Near-InfraredSpinacia oleraceaTyrosineConceptsSecondary electron transfer pathwayElectron transfer pathwayElectron paramagnetic resonance spectroscopyElectron transfer reactionsElectron transfer pathParamagnetic resonance spectroscopyHole-hopping mechanismPS II core complexesΒ-carotene moleculesPS II membranesII core complexesPhotosystem IIIR spectroscopyPS IILow temperatureCharge separationElectrostatic interactionsOxygen evolutionResonance spectroscopyLow-temperature illuminationInhibited samplesSpectroscopyEquilibrated statePeak variesSynechocystis PCC 6803
1999
Low-Temperature Optical and Resonance Raman Spectra of a Carotenoid Cation Radical in Photosystem II
Vrettos J, Stewart D, de Paula J, Brudvig G. Low-Temperature Optical and Resonance Raman Spectra of a Carotenoid Cation Radical in Photosystem II. The Journal Of Physical Chemistry B 1999, 103: 6403-6406. DOI: 10.1021/jp991464q.Peer-Reviewed Original ResearchCarotenoid cation radicalsCarotenoid cationResonance Raman spectraCation radicalsSecondary electron transfer pathwayRaman spectraFT-Raman spectraPhotosystem II core complexElectron transfer pathwayII core complexesPhotosystem IIReversible photooxidationChemical oxidationCationsLow-temperature illuminationFirst exampleCytochrome b559Absorbance maximumPhotooxidationRadicalsSpectraCore complexPossible natureOxidationSpectrum characteristics
1998
Identification of Histidine 118 in the D1 Polypeptide of Photosystem II as the Axial Ligand to Chlorophyll Z †
Stewart D, Cua A, Chisholm D, Diner B, Bocian D, Brudvig G. Identification of Histidine 118 in the D1 Polypeptide of Photosystem II as the Axial Ligand to Chlorophyll Z †. Biochemistry 1998, 37: 10040-10046. PMID: 9665709, DOI: 10.1021/bi980668e.Peer-Reviewed Original ResearchConceptsElectron paramagnetic resonanceAxial ligandsChlorophyll ZPhotosystem IIRR spectraLow-temperature electron paramagnetic resonanceWild-type Photosystem IIRedox-active tyrosinesReaction centersEfficiency of photooxidationResonance Raman spectroscopyPSII complexesIR absorbance spectraD2 polypeptidesBacterial reaction centersParamagnetic resonanceRR signatureRaman spectroscopyAccessory ChlInfrared absorbanceQuantum yieldAbsorbance bandLigandsIR excitationLow-temperature illumination